'We could've given Mason a home': Foster mum

A COAST foster parent says things could have been so much different for slain toddler Mason Jet Lee.

Nikkii Joyce has had seven foster children in her home in the past three years, ranging in age from one to 17.

She said she would've opened her door to Mason Jet Lee if she'd known the situation the 21-month-old Caboolture toddler had been in when he died.

"It breaks your heart because he was completely defenceless" she told the ABC.

"Being a foster carer there's that innate thing that we want to help kids just like this.

"We would've given Mason a home if we just knew that he needed one but the really scary thing is that our child welfare authorities knew about Mason and had known about Mason for some time.

"He'd been hospitalised twice and allowed to go back to this particular home where weeks later he was found dead."

She said it was unforgivable that he'd been able to be 'captured' by others and removed from the situation and placed in a safer environment, his death easily avoidable.

Ms Joyce is now campaigning for Mason Jet Lee's law to be established in his name which would see any report of a child suffering suspected deliberate or sexual harm made by a doctor treated by police like a triple-0 call, with child safety and Queensland Health also advised in what would be a 'team approach'.

She believed that would reduce the chances of missing a child like Mason in future, to ensure they don't slip through the cracks and meet harm.

'Act for Mason' rallies have been going on around the nation and Ms Joyce said it was a further push for a "cavalry-style" response, to ensure politicians understood the community wanted legislation made to ensure it never happened again.

More than 30,000 signatures are on a petition pushing for those changes to the law to be passed.

Ms Joyce, who described foster parenting as the "greatest thing I've ever done in my life", told the ABC she did not believe Queensland Child Safety Minister Shannon Fentiman had responded appropriately to Mason's case, and did not think Ms Fentiman was the right person for the role.

Ms Fentiman last week stood down three Caboolture-based child safety officers over Mason's death, with nine other officers referred to the Ethical Standards Unit over the handling of Mason's case.